Re: [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge

[Andi Kleen]

> This will only warn about the PEBS issue once you try and use a PEBS
> counter. Shouldn't we do this on boot? IOW. put check_pebs_quirks()

At boot the new microcode may not be loaded yet. So you have to delay
the check.

-Andi
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